prosody
b547967d87fc
plugins/mod_saslauth.lua

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plugins/mod_saslauth.lua @ 1092:b547967d87fc

mod_posix: Don't let the server run as root without the magic run_as_root in config
author Matthew Wild <mwild1@gmail.com>
date Sat, 02 May 2009 20:32:43 +0100
parent 1073:7c20373d4451
child 1186:078eb3b109e9
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2c0b9e3c11c3 0.3->0.4
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1 -- Prosody IM v0.4
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90ce865eebd8 Update copyright notices for 2009
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
38
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10
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11 local st = require "util.stanza";
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12 local sm_bind_resource = require "core.sessionmanager".bind_resource;
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13 local sm_make_authenticated = require "core.sessionmanager".make_authenticated;
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14 local base64 = require "util.encodings".base64;
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15
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16 local datamanager_load = require "util.datamanager".load;
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17 local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
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18 local t_concat, t_insert = table.concat, table.insert;
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19 local tostring = tostring;
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20 local jid_split = require "util.jid".split
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21 local md5 = require "util.hashes".md5;
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22 local config = require "core.configmanager";
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23
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24 local log = module._log;
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25
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26 local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl';
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27 local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
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28 local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
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29
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30 local new_sasl = require "util.sasl".new;
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31
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32 local function build_reply(status, ret, err_msg)
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33 local reply = st.stanza(status, {xmlns = xmlns_sasl});
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34 if status == "challenge" then
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35 log("debug", "%s", ret or "");
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36 reply:text(base64.encode(ret or ""));
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37 elseif status == "failure" then
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38 reply:tag(ret):up();
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39 if err_msg then reply:tag("text"):text(err_msg); end
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40 elseif status == "success" then
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41 log("debug", "%s", ret or "");
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42 reply:text(base64.encode(ret or ""));
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43 else
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44 module:log("error", "Unknown sasl status: %s", status);
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45 end
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46 return reply;
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47 end
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48
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49 local function handle_status(session, status)
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50 if status == "failure" then
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51 session.sasl_handler = nil;
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52 elseif status == "success" then
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53 if not session.sasl_handler.username then -- TODO move this to sessionmanager
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54 module:log("warn", "SASL succeeded but we didn't get a username!");
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55 session.sasl_handler = nil;
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56 session:reset_stream();
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57 return;
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58 end
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59 sm_make_authenticated(session, session.sasl_handler.username);
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60 session.sasl_handler = nil;
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61 session:reset_stream();
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62 end
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63 end
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64
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65 local function password_callback(node, host, mechanism, decoder)
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66 local password = (datamanager_load(node, host, "accounts") or {}).password; -- FIXME handle hashed passwords
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67 local func = function(x) return x; end;
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68 if password then
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69 if mechanism == "PLAIN" then
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70 return func, password;
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71 elseif mechanism == "DIGEST-MD5" then
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72 if decoder then node, host, password = decoder(node), decoder(host), decoder(password); end
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73 return func, md5(node..":"..host..":"..password);
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74 end
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75 end
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76 return func, nil;
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77 end
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78
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79 local function sasl_handler(session, stanza)
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80 if stanza.name == "auth" then
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81 -- FIXME ignoring duplicates because ejabberd does
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82 if config.get(session.host or "*", "core", "anonymous_login") and stanza.attr.mechanism ~= "ANONYMOUS" then
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83 return session.send(build_reply("failure", "invalid-mechanism"));
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84 elseif stanza.attr.mechanism == "ANONYMOUS" then
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85 return session.send(build_reply("failure", "mechanism-too-weak"));
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86 end
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87 session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, password_callback);
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88 if not session.sasl_handler then
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89 return session.send(build_reply("failure", "invalid-mechanism"));
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90 end
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91 elseif not session.sasl_handler then
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92 return; -- FIXME ignoring out of order stanzas because ejabberd does
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93 end
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94 local text = stanza[1];
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95 if text then
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96 text = base64.decode(text);
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97 log("debug", "%s", text);
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98 if not text then
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99 session.sasl_handler = nil;
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100 session.send(build_reply("failure", "incorrect-encoding"));
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101 return;
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102 end
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103 end
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104 local status, ret, err_msg = session.sasl_handler:feed(text);
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105 handle_status(session, status);
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106 local s = build_reply(status, ret, err_msg);
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107 log("debug", "sasl reply: %s", tostring(s));
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108 session.send(s);
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109 end
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110
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111 module:add_handler("c2s_unauthed", "auth", xmlns_sasl, sasl_handler);
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112 module:add_handler("c2s_unauthed", "abort", xmlns_sasl, sasl_handler);
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113 module:add_handler("c2s_unauthed", "response", xmlns_sasl, sasl_handler);
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114
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115 local mechanisms_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' };
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116 local bind_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-bind' };
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117 local xmpp_session_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-session' };
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118 module:add_event_hook("stream-features",
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119 function (session, features)
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120 if not session.username then
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121 features:tag("mechanisms", mechanisms_attr);
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122 -- TODO: Provide PLAIN only if TLS is active, this is a SHOULD from the introduction of RFC 4616. This behavior could be overridden via configuration but will issuing a warning or so.
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123 if config.get(session.host or "*", "core", "anonymous_login") then
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124 features:tag("mechanism"):text("ANONYMOUS"):up();
935
efe3eaaeff34 Fixed: mod_saslauth: "anonymous_login" currently makes SASL ANONYMOUS an exclusive mechanism. Corrected advertised mechanisms and error replies.
Waqas Hussain <waqas20@gmail.com>
parents: 934
diff changeset
125 else
efe3eaaeff34 Fixed: mod_saslauth: "anonymous_login" currently makes SASL ANONYMOUS an exclusive mechanism. Corrected advertised mechanisms and error replies.
Waqas Hussain <waqas20@gmail.com>
parents: 934
diff changeset
126 features:tag("mechanism"):text("DIGEST-MD5"):up();
efe3eaaeff34 Fixed: mod_saslauth: "anonymous_login" currently makes SASL ANONYMOUS an exclusive mechanism. Corrected advertised mechanisms and error replies.
Waqas Hussain <waqas20@gmail.com>
parents: 934
diff changeset
127 features:tag("mechanism"):text("PLAIN"):up();
887
eef21d7bbe04 mod_saslauth: Disable SASL ANONYMOUS unless explicitly enabled with sasl_anonymous = true
Matthew Wild <mwild1@gmail.com>
parents: 799
diff changeset
128 end
705
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
129 features:up();
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
130 else
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
131 features:tag("bind", bind_attr):tag("required"):up():up();
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
132 features:tag("session", xmpp_session_attr):up();
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
133 end
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
134 end);
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
135
438
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
parents: 357
diff changeset
136 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
137 function (session, stanza)
1072
c7967004b5d0 mod_saslauth: Various logging fixes
Matthew Wild <mwild1@gmail.com>
parents: 1071
diff changeset
138 log("debug", "Client requesting a resource bind");
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
139 local resource;
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
140 if stanza.attr.type == "set" then
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
141 local bind = stanza.tags[1];
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
142 if bind and bind.attr.xmlns == xmlns_bind then
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
143 resource = bind:child_with_name("resource");
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
144 if resource then
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
145 resource = resource[1];
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
146 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
147 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
148 end
304
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
149 local success, err_type, err, err_msg = sm_bind_resource(session, resource);
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
150 if not success then
304
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
151 session.send(st.error_reply(stanza, err_type, err, err_msg));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
152 else
304
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
153 session.send(st.reply(stanza)
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
154 :tag("bind", { xmlns = xmlns_bind})
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
155 :tag("jid"):text(session.full_jid));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
156 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
157 end);
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
158
438
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
parents: 357
diff changeset
159 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
160 function (session, stanza)
1072
c7967004b5d0 mod_saslauth: Various logging fixes
Matthew Wild <mwild1@gmail.com>
parents: 1071
diff changeset
161 log("debug", "Client requesting a session");
313
a273f3a7b8f8 Fixed mod_saslauth to use session.send for sending stanzas
Waqas Hussain <waqas20@gmail.com>
parents: 304
diff changeset
162 session.send(st.reply(stanza));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
163 end);